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KVM: arm64: Refactor setting the return value in kvm_vm_ioctl_enable_cap()

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Initialize r = -EINVAL to get rid of the error-path
initializations in kvm_vm_ioctl_enable_cap().

No functional change intended.

Suggested-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Fuad Tabba <tabba@google.com>
Acked-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240423150538.2103045-29-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Fuad Tabba 2024-04-23 16:05:36 +01:00 committed by Marc Zyngier
parent 4dc8c9de38
commit 97a3dee172
1 changed files with 9 additions and 15 deletions
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24
arch/arm64/kvm/arm.c
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@ -72,8 +72,7 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
struct kvm_enable_cap *cap)
{
int r;
u64 new_cap;
int r = -EINVAL;
if (cap->flags)
return -EINVAL;
@ -86,9 +85,7 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
break;
case KVM_CAP_ARM_MTE:
mutex_lock(&kvm->lock);
if (!system_supports_mte() || kvm->created_vcpus) {
r = -EINVAL;
} else {
if (system_supports_mte() && !kvm->created_vcpus) {
r = 0;
set_bit(KVM_ARCH_FLAG_MTE_ENABLED, &kvm->arch.flags);
}
@ -99,25 +96,22 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
set_bit(KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED, &kvm->arch.flags);
break;
case KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE:
new_cap = cap->args[0];
mutex_lock(&kvm->slots_lock);
/*
* To keep things simple, allow changing the chunk
* size only when no memory slots have been created.
*/
if (!kvm_are_all_memslots_empty(kvm)) {
r = -EINVAL;
} else if (new_cap && !kvm_is_block_size_supported(new_cap)) {
r = -EINVAL;
} else {
r = 0;
kvm->arch.mmu.split_page_chunk_size = new_cap;
if (kvm_are_all_memslots_empty(kvm)) {
u64 new_cap = cap->args[0];
if (!new_cap || kvm_is_block_size_supported(new_cap)) {
r = 0;
kvm->arch.mmu.split_page_chunk_size = new_cap;
}
}
mutex_unlock(&kvm->slots_lock);
break;
default:
r = -EINVAL;
break;
}